Buffett lamented that shareholders, not CEOs and directors, have borne most of the burden of company failures during the economic crisis.

"In my view a board of directors of a huge financial institution is derelict if it does not insist that its CEO bear full responsibility for risk control," Buffett wrote. "If he's incapable of handling that job, he should look for other employment. And if he fails at it -- with the government thereupon required to step in with funds or guarantees -- the financial consequences for him and his board should be severe."